Atomic and Electronic Properties of 2D Moiré Interfaces / Springer Theses (PDF)

Name: Atomic and Electronic Properties of 2D Moiré Interfaces / Springer Theses
Brand: Springer International Publishing
SKU: 145315891
Price: 153.99 EUR
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(Sprache: Englisch)

Autor: Astrid Weston

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Atomic and Electronic Properties of 2D Moiré Interfaces / Springer Theses, Astrid Weston

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This thesis provides the first atomic length-scale observation of the structural transformation (referred to as lattice reconstruction) that occurs in moiré superlattices of twisted bilayer transition metal dichalcogenides (TMDs) at low (¿ ...

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Studies using Scanning transmission electron microscopy (STEM) were limited due to the complexity of the (atomically-thin) sample fabrication requirements. This work developed a unique way to selectively cut and re-stack monolayers of TMDs with a controlled rotational twist angle which could then be easily suspended on a TEM grid to meet the needs of the atomically thin sample requirements. The fabrication technique enabled the study of the two common stacking-polytypes including 3R and 2H (using MoS2 and WS2 as the example) as well as their structural evolution with decreasing twist-angle.

Also reported is a comprehensive investigation of electronic properties using scanning probe microscopy and electrical transport measurements of the artificially-engineered structures. These and other studies highlight the unique intrinsic properties of TMDs and their potential application in the development of the next generation of optoelectronics.

Autoren-Porträt von Astrid Weston

Astrid Weston received her initial degree at the University of Manchester studying Materials Science and Engineering for an integrated masters degree. She went on to obtain a PhD studentship in the Graphene NOWNANO centre of doctoral training based in the University of Manchester. Here, she studied under the supervision of Professor Roman Gorbachev, specialising in nano-fabrication and scanning probe microscopy of moiré superlattices in van der Waals heterostructures. Since finishing her PhD she has been awarded the EPSRC doctoral prize fellowship which she is currently carrying out at the University of Manchester.